23=12-(6+z)

Solution for 23=12-(6+z) equation:

Simplifying
23 = 12 + -1(6 + z)
23 = 12 + (6 * -1 + z * -1)
23 = 12 + (-6 + -1z)

Combine like terms: 12 + -6 = 6
23 = 6 + -1z

Solving
23 = 6 + -1z

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Add 'z' to each side of the equation.
23 + z = 6 + -1z + z

Combine like terms: -1z + z = 0
23 + z = 6 + 0
23 + z = 6

Add '-23' to each side of the equation.
23 + -23 + z = 6 + -23

Combine like terms: 23 + -23 = 0
0 + z = 6 + -23
z = 6 + -23

Combine like terms: 6 + -23 = -17
z = -17

Simplifying
z = -17